/Engine/Source/Runtime/Core/Public/Containers/StringConv.h
Determines the length of the converted string.
The length of the string in UTF-32 characters.
template<typename SrcBufferType, std::enable_if_t< TIsCharEncodingCompatibleWith_V< SrcBufferType, [FromType](API\Runtime\Core\Containers\TUTF16ToUTF32_Convert\FromType) >> *> static int32 ConvertedLength ( const SrcBufferType * Source, const int32 SourceLen )